Product Summary

Oil pump may refer to a hydraulic pump, which pressurizes hydraulic fluid in a hydraulic system;
an oil pump (internal combustion engine), a part of the lubrication system that pressurizes motor oil for distribution around the engine; a pump jack, often used to pump oil out of wells; a submersible pump, often used to pump oil out of wells.
Hydrostatic pumps are positive displacement pumps while hydrodynamic pumps can be fixed displacement pumps, which the displacement (flow through the pump per rotation of the pump) can not be adjusted, or variable displacement pumps, which have a more complicated construction that allows the displacement to be adjusted. The oil pump (internal combustion engine) in an internal combustion engine is usually a gear type (gear pump), driven by the crankshaft or camshaft, or a rotor type (rotary pump). A pumpjack (also known as nodding donkey, pumping unit, horsehead pump, beam pump, sucker rod pump (SRP), grasshopper pump, thirsty bird and jack pump) is the overground drive for a reciprocating piston pump installed in an oil well.